Tattoos, and piercings anywhere other than your ears if you are a girl, or piercings literally anywhere if you are a boy. Oversized gym pants in general look so unflattering on girls imo. I very much prefer skirts and dresses but if considering pants, only skinny jeans are acceptable for me. And any type of clothing that is too formal is a no from me. Anyhow, these are all my personal preferences obv, people can do what they want.